Chess Puzzle #CYkuN — Expert, Black to move, endgame

Position

White: king f6; bishop d1; pawns b4/g3/h6. Black: king c3; bishop e4; pawns a6/d2. White is ahead by 1 point of material. Black to move.

Solution (10 moves)

1. Opponent setup: Kg7 — king f6→g7. Now Black to move.
2. Best move: Kxb4 — king c3→b4, captures pawn. Opponent replies h7 (pawn h6→h7).
3. Best move: Bxh7 — bishop e4→h7, captures pawn. Opponent replies Kxh7 (king g7→h7, captures bishop).
4. Best move: a5 — pawn a6→a5. Opponent replies g4 (pawn g3→g4).
5. Best move: a4 — pawn a5→a4. Opponent replies g5 (pawn g4→g5).
6. Best move: a3 — pawn a4→a3. Opponent replies g6 (pawn g5→g6).
7. Best move: a2 — pawn a3→a2. Opponent replies g7 (pawn g6→g7).
8. Best move: a1=Q — pawn a2→a1, promotes to queen. Opponent replies g8=Q (pawn g7→g8, promotes to queen).
9. Best move: Qxd1 — queen a1→d1, captures bishop. Opponent replies Qb8+ (queen g8→b8, gives check).
10. Best move: Ka3 — king b4→a3. Opponent replies Qd6+ (queen b8→d6, gives check).
11. Best move: Ka2 — king a3→a2.

Tactical themes

advanced pawn, bishop endgame, crushing, defensive move, endgame, promotion, quiet move, very long. The key move Kxb4 wins material.

Position data

FEN: 8/8/p4K1P/8/1P2b3/2k3P1/3p4/3B4 w - - 3 58

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